Hi Eric,
Thanks! I did it on the right wall already. However, that part is from the left wall which I need the molding on that side but not on the other side. It looks like it's related to the left wall that I couldn't get rid of it.
Thanks Renerabbitt
I make the symbol and stretch it in its width already. How can I convert it to a sink symbol and I try to use subtract again to make the hole, but couldn't success. What did I do wrong?